Synonyms of buttoned-down

1 Syllable
right, pious, straight, sound, true
2 Syllables
correct, die-hard, devout, old-line, rightful, square, standard, proper
3 Syllables
religious, button-down, conformist, orthodox, received, punctilious, sanctioned, approved, official, admitted, doctrinal
4 Syllables
customary, acknowledged, conventional, reactionary, established, recognized, canonical
5 Syllables
well-established, legitimate, conservative
6 Syllables
authoritative, traditionalistic